Oil-pump screen cage



lune 17, 1930. c. E. JACOBS OIL PUMP SCREEN CAGE 7 Filed Dec. 7, 1927 IN VEN TOR,

ATTORN Patented June 17, 1930 UNITED STATES CLARENCE E. JACOBS, OFDETROIT, MICHIGAN OIL-PUMP SCREEN CAGE Application filed December 7, 1927. Serial No. 238,331.

The present invention relates to a process of making screen cages for oil pumps of motor vehicle engines and to the product of such process.

Among the objects of the invention is to greatly cheapen the production of such cages both by saving material and by simplifying the tools needed and their upkeep.

Other objects will readily occur to those skilled in the art upon reference to the following description and the accompanying drawing in which Fig.1 is a plan view of a blank in the first stage of the process;

Fig. 2 is an edge view of the same;

Fig. 3 shows the blank after the second step;

Fig. at shows the part punched out of the blank and its use as a second blank;

Fig. 5 shows the second punching;

Fig. 6 shows the final form of the part shown in Fig. 3;

Fig. 7 shows the final form shown in Fig. 5; and

Fig. 8 shows a side view of a finished cage.

As indicated, the process comprises first stamping out of suitable sheet metal, discs of the part 10 of a suitable size and forming upon these a narrow flange 11. These flanged discs are then, by means of a suitable punch, out out to leave a flanged ring 1O having inwardly projecting radial tongues 12.

The punching 13 taken from the tongued ring is used as a blank from which to punch the spider 14, consisting of 'a central disc having outwardly extending radial tongues 15.

The ring 1O is then, by means of a suit able die, formed as in Fig. 6, that is, the tongues 12 are bent down and curved inwardly as at 16 and each provided with a shouldered or stepped end 17.

The spider 14 is then also die formed to the shape shown in Fig. 7 that is the tongues 15 are curved upward as at 18 on approximately the same radius as the tongues 16. At the same time, the disc portion of spider 14 is cupped inwardly as at 19 and provided with a central opening indicated by the dotted line 20 in Fig. 5.

When the parts 10 and 14: have been so formed, the ends of tongues 18 are placed on the shoulders 17 and welded thereto as at 21, producing the form of cage shown in Fig. 8.

By producing the cage in the manner described, not only is there a great saving of material but the stiffness and strength of the material is not impaired, such as will happen when such cages are produced by drawing out the cup portion prior to cutting away the metal, leaving the ribs, or by cutting away the metal before drawing. The ribs will have the same cross sectional area throughout due to the fact that they are stamped from a fiat piece and merely bent to form.

Now having described the invention and the preferred form of embodiment thereof it is to be understood that the said invention is I to be limited, not to the specific details herein set forth, but, only by the scope of the claim which follows.

I claim:

A two-piece cup-like cage for oil pump screens comprising a large ring having integral ribs extending downwardly for a substantial distance and inwardly, and a small bottom member having integral ribs extending upwardly for a substantial distance and outwardly, the ribs of one set being secured to the ribs of the other on a circle larger than that of the bottom member but smaller than that of the ring, whereby a cage of considerable depth is formed.

CLARENCE E. JACOBS. 

